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Texas Instruments LF353MX
- Part No.:
- LF353MX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LF353MX.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,024
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Product details
Overview
LF353MX from Texas Instruments is a dual JFET-input operational amplifier optimized for high-speed, low-noise analog signal conditioning in industrial and instrumentation systems. It delivers 4 MHz gain bandwidth, 13 V/μs slew rate, 10¹² Ω input impedance, 50 pA input bias current, and 25 nV/√Hz input voltage noise - enabling precision integrators, fast D/A converters, and sample-and-hold circuits requiring wide dynamic range and minimal DC error.
For engineers reviewing the LF353MX datasheet, LF353MX pinout, LF353MX application, or LF353MX equivalent, key selection criteria include its JFET-input architecture for ultra-low bias current, SOIC-8 packaging for board space efficiency, ±18 V supply capability, 0°C to +70°C operating range, and compatibility with legacy LM1558-based designs needing performance upgrades without layout changes.
Technical Context
The LF353MX implements a BI-FET II process with matched high-voltage JFET input pairs, delivering inherently low input offset voltage (10 mV max) and drift (10 μV/°C), while maintaining rail-to-rail common-mode input range up to ±11 V with ±15 V supplies. Its zener-biased internal current sources enable stable operation down to ±6 V supplies.
It features fully independent dual amplifiers with no crosstalk below −120 dB (input-referred), supports continuous output short-circuit operation, and exhibits low 1/f noise corner at 50 Hz - making it suitable for DC-coupled, medium-bandwidth precision applications where thermal and 1/f noise must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 4 MHz typical - enables stable unity-gain stable configurations up to ~4 MHz or closed-loop gains of 10 at ~400 kHz. |
| Slew Rate | 13 V/μs typical - supports full-scale step response in <2 μs to 0.01% for 10 V outputs, critical for fast DAC buffering. |
| Input Bias Current | 50 pA typical at 25°C - minimizes voltage error across high-impedance sensor interfaces (e.g., piezoelectric, photodiode). |
| Input Voltage Noise | 25 nV/√Hz typical at 1 kHz - ensures low-noise amplification in audio preamps and instrumentation front-ends. |
| Common-Mode Rejection | 100 dB typical - rejects interference in differential sensing (e.g., bridge amplifiers) without significant gain error. |
| Supply Current per Amplifier | 3.6 mA typical - balances speed and power for dual-channel operation in space-constrained industrial modules. |
| Operating Temperature Range | 0°C to +70°C - qualified for commercial and industrial control environments without extended temperature derating. |
Pinout & Package
LF353MX is housed in an 8-pin SOIC (D package), 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant with matte tin (Sn) lead finish and MSL Level-1 rating (260°C peak reflow, unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output; capable of ±13.5 V swing into 10 kΩ load with ±15 V supplies. |
| 2 | Inverting Input A | High-impedance JFET input (10¹² Ω); accepts differential voltages up to ±30 V regardless of supply rails. |
| 3 | Non-Inverting Input A | Matched JFET input with identical bias and noise characteristics as Pin 2; common-mode range extends to ±11 V. |
| 4 | V– | Negative supply terminal; must not be exceeded by either input voltage to avoid destructive current flow. |
| 5 | Non-Inverting Input B | Independent second amplifier input; electrically isolated from Amp A with <−120 dB coupling. |
| 6 | Inverting Input B | Second amplifier inverting input; same noise, bias, and CMRR specs as Pins 2 and 3. |
| 7 | Output B | Amplifier B output; fully symmetrical performance to Pin 1, supporting dual-channel signal paths. |
| 8 | V+ | Positive supply terminal; supports operation from ±6 V to ±18 V; zener bias allows function at minimum ±6 V. |
Key Features
| Feature | Design Value |
|---|---|
| Internally trimmed offset voltage | 10 mV max - eliminates need for external nulling circuitry in production-grade instrumentation. |
| Low 1/f noise corner | 50 Hz - preserves signal integrity in DC-coupled sensors and low-frequency measurement systems. |
| Fast settling time | 2 μs to 0.01% - enables high-throughput data acquisition with minimal dead time between samples. |
| High input impedance | 10¹² Ω - prevents loading of high-Z sources such as electret microphones or capacitive transducers. |
| Low total harmonic distortion | ≤0.02% at 20 Vp-p, 20 Hz–20 kHz - meets fidelity requirements for audio tone controls and active filters. |
Applications
| Audio Tone Control | Instrumentation Amplifier Front-End |
|---|---|
|
Use Scenario: Three-band active equalizer in consumer and pro-audio equipment, with bass/treble/mid boost/cut via potentiometers. IC Role / Device Role / Timing Role: Dual op-amp providing simultaneous inverting/non-inverting gain stages for frequency-selective feedback networks. Use Value: LF353MX's low THD (≤0.02%) and wide GBW (4 MHz) preserve tonal accuracy across full audio band without phase-induced coloration. |
Use Scenario: High-CMRR differential amplifier stage for strain gauge or RTD bridge measurements in PLC analog input modules. IC Role / Device Role / Timing Role: First-stage buffer and gain-setting element in improved CMRR topology using matched JFET inputs. Use Value: 100 dB CMRR and 50 pA input bias minimize offset drift and bridge imbalance errors under varying EMI conditions. |
| Sample-and-Hold Circuit | Ohms-to-Volts Converter |
|
Use Scenario: Precision sampling of fast analog signals in data acquisition systems prior to ADC conversion. IC Role / Device Role / Timing Role: Unity-gain buffer driving hold capacitor; fast settling (2 μs) ensures accurate capture at >500 kSPS rates. Use Value: 13 V/μs slew rate and low input capacitance prevent droop and aperture uncertainty during acquisition window. |
Use Scenario: Linear conversion of resistive sensor outputs (e.g., thermistors, RTDs) to calibrated voltage signals for microcontroller ADCs. IC Role / Device Role / Timing Role: Transimpedance configuration with precision feedback resistor; JFET inputs avoid bias-current-induced gain error. Use Value: 10¹² Ω input resistance ensures negligible current draw from high-resistance sensors (<100 kΩ), preserving linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CDR | Lower supply current (1.4 mA/amplifier) but reduced GBW (1.7 MHz) and higher VOS (10 mV typ, 25 mV max). | Better suited for battery-powered, low-speed sensor interfaces; insufficient for fast DAC buffering or audio. | Select when ultra-low power dominates over speed/noise; verify offset stability over temperature. |
| TL072CP | Identical SOIC-8 pinout and JFET architecture; slightly higher VOS (15 mV max) and lower IB (65 pA typ). | Direct drop-in replacement in most LF353MX layouts; widely available but less optimized for low-noise audio. | Choose for cost-sensitive industrial designs where 25 nV/√Hz noise is non-critical and sourcing favors broad distributor stock. |
Compared with TLC27L2CDR and TL072CP, the LF353MX offers superior noise performance (25 nV/√Hz vs. 34 nV/√Hz) and faster settling (2 μs vs. 5 μs), making it preferred for medium-bandwidth precision signal chains where fidelity and transient response are prioritized over minimal quiescent current.
Availability
LF353MX is available at Aetrix Electronics and suitable for industrial automation, test equipment, and audio electronics requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.
Supply support for LF353MX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies, with decades of heritage in high-reliability op-amp design and manufacturing.
The LF353MX belongs to TI's legacy BI-FET II JFET-input op-amp family, engineered for industrial instrumentation, audio signal processing, and precision analog computing where low bias current, low noise, and wide bandwidth are essential.
FAQ
What is the maximum supply voltage for the LF353MX?
The LF353MX supports a maximum supply voltage of ±18 V, with absolute maximum ratings specifying ±18 V across V+ and V– terminals. Operation at ±15 V is standard for characterization, and the device remains functional down to ±6 V due to internal zener biasing - though gain bandwidth and slew rate decrease at lower supplies. Exceeding ±18 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does the LF353MX have rail-to-rail input or output capability?
No, the LF353MX does not feature rail-to-rail input or output. Its input common-mode voltage range is specified as ±11 V with ±15 V supplies, meaning inputs must stay ≥3 V above V– and ≤4 V below V+. Output swing is ±13.5 V into 10 kΩ, limited by internal saturation - not reaching the supply rails. For true rail-to-rail operation, consider modern alternatives like the OPA2333 or TLV2462.
Is the LF353MX pin-compatible with the LM358?
No, the LF353MX is not pin-compatible with the LM358. While both are dual op-amps in SOIC-8 packages, the LF353MX follows the standard dual-op-amp pinout (V–, Out A, In– A, In+ A, In+ B, In– B, Out B, V+), whereas the LM358 uses a different arrangement (V–, Out A, In– A, In+ A, V+, In+ B, In– B, Out B). The LF353MX is explicitly pin-compatible with the LM1558, not the LM358.
What is the typical input offset voltage drift over temperature for the LF353MX?
The LF353MX has an average temperature coefficient of input offset voltage (ΔVOS/ΔT) of 10 μV/°C, as specified in TI's DC Electrical Characteristics table. This means that over a 0°C to +70°C operating range, the offset voltage can drift up to approximately 700 μV beyond its room-temperature value - a critical factor in DC-coupled precision applications requiring long-term stability without auto-zeroing.
Can the LF353MX drive a 600 Ω audio load directly?
The LF353MX is not rated to drive 600 Ω loads continuously. Its output stage is characterized for 2 kΩ loads (±10 V swing over full temperature), and driving heavier loads increases output stage heating, degrades THD, and may cause output voltage sag or increased offset. For 600 Ω audio interfacing, use an external buffer stage or select a purpose-built audio op-amp like the NE5532 or OPA1612.
LF353MX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 5 mV
- Current - Supply:
- 3.6mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LF353MX FAQ
1.How can I place an order for LF353MX through Aetrix?
Please submit a Request for Quotation (RFQ) for LF353MX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LF353MX reliable?
The price and inventory of LF353MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LF353MX is usually 5 days.
3.What payment methods are accepted for LF353MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LF353MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LF353MX?
LF353MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LF353MX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LF353MX?
For technical support, including LF353MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LF353MX requirements.
6.How does Aetrix verify that LF353MX is sourced from the original manufacturer or authorized distributors?
All LF353MX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LF353MX meets industry standards.
7.What is the process for return or replacement of LF353MX?
All LF353MX units undergo pre-shipment inspection (PSI). If there is an issue with LF353MX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LF353MX part is unused and in its original packaging.
Return procedure for LF353MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LF353MX Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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